巴比妥类药物进入脑组织快慢主要取决于
A．药物分子大小
B．给药途径
C．用药剂量
D．药物脂溶性
E．药物剂型
参考答案：D
The villagers have already known _____ we'll do is to rebuild the bridge. [ ]
A. this
B. that
C. what
D. which
—Can't you see the car on the hill?
— ________.[ ]
A. Yes, I can't.
B. No, I can.
C. No, I can't.
D. Yes, I'm.
