___________ books do you have?[ ]
A. How much
B. How are
C. What's
D. How many
答案:D
Plastic bags won't be allowed to be used for free in the supermarkets. They can' t __________
easily, which does great harm to our environment. [ ]
A. break off
B. break in
C. break down
D. break out
在库中有一个元件,其高度为100像素,要在舞台上创建该元件的一个实例。如果此时首先在舞台上把这个实例的高度变为50像素,然后再把元件的高度变为200像素,那么这时该实例的高度为()。
A.25像素
B.50像素
C.100像素
D.200像素