十进制数90转换成无符号二进制数是______。A) 1011010 B) 1101

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问题单项选择题

十进制数90转换成无符号二进制数是______。

A) 1011010
B) 1101010
C) 1011110
D) 1011100

答案

参考答案：A

解析：十进制转换为二进制：2⁶+2⁴+2³+2¹=90，所以90的二进制表示为1011010。

填空题

用括号中所给单词的适当形式填空。

1. ________ (do) your mother have a computer?

2. That ________ (sound) interesting.

3. Our school________ (have) a baseball team.

4. He has many balls in his room. Can you see ________ (they)?

5. My mother ________ (watch) sports on TV.

6. Let ________ (we) play volleyball.

7. You can join ________ (we) sports center.

8. We have many sports ________ (club).

单项选择题

某台锅炉欲对其进行烟气成分分析，以估计炉膛水冷壁的腐蚀程度，最适宜的烟气取样点是在下列（）位置。

A.炉膛出口

B.空气预热器进口或出口

C.炉膛腐蚀壁面附近

D.引风机出口