如图，在△ABC中，∠ACB=90°，BE平分∠ABC，DE⊥AB于D，如果AC_爱下问搜题

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问题选择题

如图，在△ABC中，∠ACB=90°，BE平分∠ABC，DE⊥AB于D，如果AC=3 cm，那么AE+DE等于[ ]

A．2cm

B．3cm

C．4cm

D．5cm

答案

答案：B

填空题

用所给的词的适当形式填空。

be allowed to, instead of, at that age, be strict with, be good for,
at present, think about, have…off, learn…from, stay up

1. His father asked the teacher to               his son.
2.               computer is the most important tool for the people in the world.
3. What do you                your trip to London?
4. Visitors                take photos here.
5. Students should               each other.
6. I'm so busy, I do not              a day               for two months.
7. Sometimes it               your health to drink some wine.
8. You are too heavy. I think you have to eat more vegetables              meat.
9. The parents allowed their children              for their favorite programme.
10. He was very shy to talk to the girls              .

问答题简答题

何谓心力储备?