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【单选题】
怎样测量避地雷地线接地电阻值（）。A.
测量仪器放置水平，调整“零位调节螺丝”，使表针处于测量标度盘盘窗中心线上
B.
将“倍率指示”置于最小倍数上，转动“测量标度盘”使电表的指针在中心线上
C.
如果“测量标度盘”的读数小于1，“倍率指示”置于较大的倍数
D.
“测量标度盘”上指示的读数即为所测避雷地线接地电阻的电阻值
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【单选题】We'll go to visit Tian' an men Square _____ it doesn't rain tomorrow. [ ]
A.
if
B.
as soon as
C.
when
D.
since
【简答题】We shall see an exhibition of pain-tings if it _________ (not rain) tomorrow.A. doesn't rain
【多选题】canvas的drawImage方法可以完成以下哪些操作?
A.
在canvas上绘制原始图像
B.
在canvas上绘制放大或缩小后的图像
C.
在canvas上绘制一部分图像内容
D.
在canvas上绘制半透明的图像。
【简答题】Take an umbrella with you if it ______ tomorrow. A. rain B will rain C rains D is raining
【简答题】用括号中动词的正确形式填空。 If it (rain), I shall take an umbrella with me. You nevrer (pass) this test if you don't work hard. If he (be) here before 10 o'clock, I shall see him. If he plays well, he (get) into t...
【单选题】I don't think it will rain, but I'll take an umbrella______it does.
A.
as if
B.
in case
C.
as though
D.
even if
【单选题】It seems that it's going to rain. If I _____ you, I ______ take an umbrella with me. [ ]
A.
am, will
B.
was; would
C.
were; would
D.
were, will
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