恒定一元流能量方程的推导应用了物理学的（）。 A.能量守恒定律

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问题单项选择题

恒定一元流能量方程的推导应用了物理学的（）。

A.能量守恒定律和动量定理

B.质量不灭定律和能量守恒定律

C.牛顿第二定律和能量守恒定律

D.动量定理和质量不灭定律

答案

参考答案：B

填空题

根据情景，在横线上写出一个英语单词的正确形式，使对话通顺。．

小题1: - Have you made the_______ to study abroad?

- Not yet. I wonder whether it is worth so much money.

小题2: -What do you think of the new building?

-_______ with the old one, the new building looks more beautiful.

小题3: -Why were you late yesterday afternoon?

-The bus was so_______ that we couldn't get on it.

小题4: -Our monitor came first in the long jump. She jumped the_______．

-Congratulations to her.

小题5: -I often listen to the song Yesterday Once More.

-So do I．It_______ beautiful.

单项选择题

腮腺导管 * * 位于（）。

A.颊脂垫尖处

B.翼下颌皱襞与颊脂垫尖之间

C.颊部粘膜的下1／3处

D.平对下颌第二磨牙冠部的颊粘膜上

E.平对上颌第二磨牙冠部的颊粘膜上