在商店里，你想知道某件物品的价格，应该说：[ ]
A. How much is this？
B. How many is this?
A
They managed to carry on their experiments _____ the difficulties.
[ ]
A. in spite of
B. in place of
C. in memory of
D. in hope of
C220 CL1A板与内部系统存在几个GE通讯口？（）
A.1
B.2
C.3
D.4
