单选题
单选题19世纪中期,美国为发展资本主义,兴起“西进运动”,在此过程中( )
单选题过点P5,0与圆χ2+y2-4χ-5=0相切的直线方程是
单选题Enough sleep is important to health.The amount of sleep(21)depends on the age of the per-son and the conditions in which sleep(22).The young may need more sleep than the old,hut(23)eight hours are eno
单选题“几日随风北海游,回从扬子大江头。臣心一片磁针石,不指南方不肯休。”这首诗的作者最有可能是( )。
单选题Enough sleep is important to health.The amount of sleep(21)depends on the age of the per-son and the conditions in which sleep(22).The young may need more sleep than the old,hut(23)eight hours are eno
单选题若a,b,c,为实数,且a≠0.设甲:,乙:有实数根,则()
单选题请选出下面划线部分读音不同的选项
单选题抛物线的准线方程为( )
单选题函数y=6sinxcosx的最大值为( )
单选题设ƒ(x+1)=x(x+1),则ƒ(2)=( )
单选题设fx为偶函数,f-2=3若,则f2=( )
单选题Our eating habits are very important for good health and a strong body.There are times when most of us would rather eat sweets and ice-cream than meat and rice.Sweets and ice-cream are not bad if we e
单选题复数为实数,则a=()
单选题Enough sleep is important to health.The amount of sleep(21)depends on the age of the per-son and the conditions in which sleep(22).The young may need more sleep than the old,hut(23)eight hours are eno
单选题a,b是实数,a≠b,且ab≠0,方程bχ2+ay2=ab及y=aχ+b行表示的曲线只能是
单选题
单选题依次填入下列横线处的词语,恰当的一项是( )。在异乡求学时,我______过一首歌。每当夜幕降临,我就关上房门,打开录放机______播放。伴着熟悉的旋律,______在对远方亲人的思念中。
单选题下列各句中加点成语使用的一项是( )。
单选题函数y=2χ的图像与函数χ=log2y的图像