.FDA can ask for the proof of safety and effectiveness of a product ________.
A. if it is a drug
B. if it is a device
C. if its consumers make complaints
D. if its distributors challenge FDA’s authority
第1题:
9. —Can you play basketball?
—Yes, I_________ .
A. am
B. do
C. must
D. can
第2题:
— Jane, I’m coming to say good-bye. I’m leaving tomorrow.\n— _______
A.I’m sorry.
B.Oh, no. Why?
C.Go slowly.
D.Why soon? Can’t you stay a few days longer?
第3题:
What will be the output of the follow C code?
#define product(x) (x*x)
main()
{
int i = 3, j, k;
j = product(i++);
k = product(++i);
printf("%d %d",j,k);
}
第4题:
7.I_______ dance. It's too difficult for me.
A. can
B. am
C. can’t
D. am not
第5题:
If any beasts comes at you, I()stay with you and help you.
A、am going to
B、will
C、can
第6题: