检查4.2-3.65 =0.55对不对，不可以用什么验算[ ]
A．3.65 -0.55
B．4.2 -0.55
C．3.65 +0.55
答案：A
-- How are you planning to travel to Shanghai?
--- I ______ yet, but I ______ taking a train.
A．didn’t decide; am considering
B．haven’t decided; consider
C．haven’t decided; am considering
D．hadn’t decided; have considered
对单台电动机，熔体额定电流大小按（）倍电动机额定电流选择。
A.1.25—1.5
B.1.5—2.5
C.3
D.4
