课的类型一般分为两大类,即()。
A.讲授课和练习课
B.讲授课和复习课
C.讲授课和实验课
D.单一课和综合课
参考答案:D
18.—Jim, are you ______ this Saturday?
—Oh, sorry. I need to go to the bookshop _____ the bank on Saturday.
A.convenient; and
B.convenient; as well as
C.available; as well as
D.available; with
常温下大脑皮质能耐受完全缺血时间()
A.3~4分钟
B.10~15分钟
C.20~40分钟
D.45分钟
E.60分钟