单选题During the King's illness, the doctor issued ______ twice a day. A. urgencies B. emergencies C. statements D. bulletins

单选题It is more important to______the way for children's desire to know than to put them on a diet of facts they are not ready to assimilate.

单选题These plastic flowers look so ______ that many people think they are real.

单选题People are waiting for ______ of whether the man is innocent or not. A. prediction B. perturbation C. expedition D. confirmation

单选题We have to______ that he is a highly competent man.

单选题A scientific law is liable at any time to need modifying. This happens when fact is discovered which seems to ______ what the law would lead one to expect. A.prove B.support C.contradict D.discourage

单选题Mycorrhizal fungi infect more plants than do any other fungi and are necessary for many plants to thrive, but they have escaped widespread investigation until recently for two reasons. First, the symbiotic association is so well-balanced that the roots of host plants show no damage even when densely infected. Second, the fungi cannot as yet be cultivated in the absence of a living root. Despite these difficulties, there has been important new Work that suggests that this symbiotic association can be harnessed to achieve more economical use of costly superphosphate fertilizer and to permit better exploitation of cheaper, less-soluble rock phosphate. Mycorrhizal benefits are not limited to improved phosphate uptake in host plants. In legumes, mycorrhizal inoculation has increased nitrogen fixation beyond levels achieved by adding phosphate fertilizer alone. Certain symbiotic associations also increase the host plant's resistance to harmful root fungi. Whether this resistance results from exclusion of harmful fungi through competition for sites, from metabolic change involving antibiotic production, or from increased vigor is undetermined.

单选题James is quite ______ with the customs and languages of the people in that part of the country.

单选题With which of the following will Bellesiles most probably agree?

单选题The vast ______ area of this country enabled us to welcome the hordes of immigrants that flocked to our shores.

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单选题The writer seems to______between approving of Collin's actions and finding them disgusting.

单选题The author's attitude toward closing libraries can be described as ______.

单选题Australia began to assume its modern configuration by the Eocene Epoch, some 50 million years ago, when Antarctica broke away and drifted southward.

单选题Although it was none of my business I asked her if the one she was lamenting for was in any way kin.

单选题The rear section of the brain does not contract with age, and one can continue living without intellectual or emotional faculties. A. advanced B. growing C. front D. back

单选题She never failed to ______ his accomplishments by pointing to his brother's eminence. A. release B. disesteem C. disparage D. pretense

单选题The research described in the passage is primarily concerned with answering which of the following questions?