题目内容：
( ) Jack not busy, he would help us.A.If
B.Were
C.Had
D.Did
参考答案：
选择题：( ) Jack not busy, he would help us.
- 题目分类：当代英语语法概论
- 题目类型：选择题
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A.If
B.Were
C.Had
D.Did
A.If
B.Were
C.Had
D.Did
2. 在模拟量输出通道中,计算机输出的数字量通过( )转换成模拟量,再经反多路开关与相应的执行机构相
2. 在模拟量输出通道中,计算机输出的数字量通过( )转换成模拟量,再经反多路开关与相应的执行机构相连,以便对被测参数进行控制。(本题2.0分) A、 A/D转
6. 在LED显示系统中,若采用共阴极显示器,则将段选模型送至( )。(本题2.0分) A、 阳极
6. 在LED显示系统中,若采用共阴极显示器,则将段选模型送至( )。(本题2.0分) A、 阳极 B、 阴极 C、 阴极或阳极 D、 先送阴极再送阳极
55[填空题,0.7分] Fill in the blanks with appropriate p
55[填空题,0.7分] Fill in the blanks with appropriate preposition:A lot of chemicals
( ) seeing the damage he had done, the child quick
( ) seeing the damage he had done, the child quickly ran away. A.At B.By C.
81[填空题,0.7分] Fill in the blanks with appropriate p
81[填空题,0.7分] Fill in the blanks with appropriate preposition:I went nowhere exce