一般说来，表面张力小的液体对固体表面的润湿作用：（）
A.强
B.弱
C.无关
D.不能湿润
参考答案：A
I kept looking at the man wearing a pair of glasses, wondering ________.
A．whether did I borrow his book
B．where I had seen him before
C．what I knew his wife
D．when had I helped him
64÷8=86300÷7=90072÷6=12
640÷8=______ 6300÷70=______ 720÷60=______
6400÷8=______ 6300÷700=______ 7200÷600=______．
