题目

若处于光线不足的实验室中观察显微镜，调整时应用什么样的反光镜及光圈？（ ）A． 平面镜、大光圈 B． 平面镜、小光圈C． 凹面镜、大光圈 D． 凹面镜、小光圈 答案：C连词成句。1. interested, is, English, Tom, in _____________________________________________________? 2. afternoon, we, football, will, tomorrow, play _____________________________________________________.3. library, now, I, go, just, him, the, saw, into _______________________________________________________. 4. until, o'clock, come, home, did, three, this, back, not, morning, Sandy _______________________________________________________. 5. to, teach, send, can, e-mail, how, you, me, an _______________________________________________________?