利用上颌双侧胎垫矫正反牙合，、反牙合解除后胎垫每次应磨去多少A．0.5～1.0mm

判断下列句子是否符合短文内容，符合的写"T"，不符合的写"F"。

      When David was playing in front of a big house, a man arrived. The man asked David, "Are your

parents at home? I have a letter for them." David answered, "Yes. My father is watching TV and my

mother is taking care of my little sister." The man rang the doorbell but no one answered the door."Are

they sleeping?" the man said to himself. The man tried again, but still no one answered. Then the man

turned around and said to David, "You bad boy. You lied (说谎) to me! Your parents aren't at home."

"I never lie," said David. "This is not my house!" 

( )1. David was playing behind a big house.

(     )2. David's father was sleeping and his mother was watching TV.

(     )3. The man rang the doorbell but nobody opened the door for him.

(     )4. David lied to the man.

(     )5. David didn't live in that big house.

1854-1856年克里米亚战争南丁格尔率领38名护士奔赴前线医院救护，使士兵死亡率由42%下降至，这也可以说是急危重症护理学的起源。（）

A.6%

B.8%

C.2%

D.4%

E.8%

在下图中，所用的刻度尺的分度值是______，测得物体的长度是______cm．

简述心绞痛患者的护理。

试述104型分配阀的组成和各部功用？