配电所、变电所的高压及低压母线宜采用( )接线。A．单母线带旁路母线 B．单母线或

动词填空。

1. Daniel needn't _____ (finish) his homework now and he can do it after school.

2. It's bad _____ ( not take) exercise for some time a day.

3. Try this kind of mango, and I'm sure you ____  (like) it.

4. We will go to the cinema if it _____ (be) sunny tomorrow.

5. Look! Tom _____ (play) with his parrot.

6. The skirt makes her _____ (look) pretty.

7. I _____ (take) the photo in Beijing two years ago.

8. He spends more than two hours _____ (do) his homework every day.

钩端螺旋体生长的最适温度是（）

A.37℃

B.20～30℃

C.25～30℃

D.30～35℃

E.40～45℃

某厨房购进带皮腿肉10千克，其进货单价为25元/千克，加工后得净腿肉8千克，其它猪皮、骨头等合计30元，则净腿肉的单位成本为（）。

A.26.5元/千克

B.28元/千克

C.27元/千克

D.27.5元/千克

学龄前儿童膳食中优质蛋白质应占蛋白质总量的( )。

A．20%

B．30%

C．40%

D．50%

从心理学的角度考虑，开发人员和调试人员应该是同一个人。