调制解调器的英文名是( )。 A．Modem B．Bridge C．Route

治疗脱证可艾灸______穴，每日______次，每次______分钟。

On the table, there _______ some chicken, some rice and some carrots beside the glass of milk. [ ]

A. is

B. am

C. are

D. be

请你用所给词的适当形式完成下列句子。

1. Here are some things they have learned from ______(scientist ) studies.

2. Sunglasses are used for _____ (keep) out the sun.

3. The students are ______ (confuse) about the ______ (confuse) problem.

4. I’m considering _____ (study) in Beijing or Shanghai.

5. I felt _______(embarrass) when everyone looked at me.

若一棵二叉树具有10个度为2的结点，5个度为1的结点，则度为0的结点个数是______。

A．9

B．11

C．15

D．不确定

估算机器设备的实体性贬值主要有哪些方法