使用显微镜观察洋葱鳞茎表皮细胞,在光线较暗时,应该选用( )
A:较小光圈 凹面镜
B:较大光圈 凹面镜
C:较小光圈 平面镜
D:较大光圈 平面镜
选择正确的搭配
①What can you do?____ I like jelly.
②What do you need?____ I can fly a kite.
③What do you like? ____ I need a blouse.
④What do you see?____ I hear a pig.
⑤What do you hear? ____ I see a sheep.