单选题
A summary of the physical and chemical nature of life must begin, not on the Earth, but in the Sun; in (67) at the Sun's very center. It is here that is to be found the (68) of the energy that the Sun pours out into space is (69) The energy takes the form of light and heat. This energy is (70) at the center of the Sun as billions (71) billions of nuclei of hydrogen atoms (72) with each other and fuse together to form nuclei of helium, and in doing so, (73) some of the energy that is (74) in the nuclei of atoms. The (75) of light and heat of the Sun (76) that some 600 million tons of hydrogen be (77) into helium (氦) in the Sun every second. This the Sun has been doing for several thousands of millions of years. The nuclear energy is released at the Sun's center as high-energy gamma radiation, (78) of electromagnetic radiation like light and radio waves, only of very much shorter (79) . This gamma radiation is absorbed by atoms inside the Sun to be (80) at slightly longer wavelengths. This radiation, in its (81) is absorbed and reemitted. As the energy filters through the (82) of the solar interior, it passes through the X-ray part of the spectrum (83) becoming light. At this stage, it has reached what we call the solar surface, and can escape into space without being absorbed further by solar atoms. A very small (84) of the Sun's light and heat is emitted in such directions that (85) passing unhindered through interplanetary space, it (86) the Earth.
【答案解析】[精解] 动词辨义题。该句意为:数十亿计的氢原子核在太阳的核心碰撞并且聚变生成氦,从而释放出能量。根据前文的the Sun... pours out into space as light and heat. 也可判断该处是详细说明太阳是怎样释放能量的。故选择liberated“释放,解放”。set,意为“放置”,能量被放置在太阳核心,讲不通;chase意为“追捕,追逐”;expel意为“驱逐”,与原文意思无关联,可排除。
【正确答案】
C
【答案解析】[精解] 介词辨义题。此处表达的意思是:数十亿计的。应选用搭配billions upon billions“数十亿计的”。 upon有累加的意思。
【正确答案】
B
【答案解析】[精解] 动词辨义题。hydrogen atoms ... with each other and fuse together to form nuclei of helium. 该句是对氢原子核生成氦的具体描述。氢原子核在怎样后。才能通过融合聚变成氦。可推测,氢原子核只有在首先相碰撞后,才能融合。故选择collide“碰撞”。deal with意为“处理”;meet意为“遇见,碰见”,表达不出相互撞击,相互接触的意思;be charged with是固定搭配,意为“被指控……”,与原文无关,可排除。
【答案解析】[精解] 动词辨义题。some of the energy that is... in the nuclei of atoms“释放出______ 在原子核中的一些能量”,可推测能量必然是储藏在原子核中的,故选择store“储藏,储存”。strain意为“拉近,过分使用,使劳累”;hide意为“隐藏”,文中只是储存的意思,并不带隐蔽的,秘密的这一感情色彩;put意为“放置”,能量是自然存在于原子核中的,并非人为放置,故可排除。
【答案解析】[精解] 名词辨义题。此处意在说明:high-energy gamma radiation“高能伽马射线”是electromagnetic radiation“电磁射线”中的一种。故应选择form“形式”,a form of意为“……的一种形式”。a matter of意为“是……的问题”,如it is a matter of time;a variety of意为“多种多样的”,伽马射线是多种多样的电磁射线,讲不通;forum意为“论坛”,与原文无关,可排除。
【答案解析】[精解] 固定搭配题。in its turn意为“轮流,轮到做……”。该句意为:这同轮到这些新的射线再次被吸收,而后释放。
【正确答案】
B
【答案解析】[精解] 名词辨义题。filter through意为“渗透”。该句描述的是“能量从太阳内部怎样地渗透出来”,可推测是指层层渗透,即through the layers of the solar interior,故选择B)项。layout意为“布局,安排”,词形相近,词义不同;floor。和storey都是指“楼层”,不准确,可排除。