手工套丝板架上有（）个相互垂直和一个水平面上的牙室，对号装上一组活络板牙。
A.2
B.4
C.6
D.8
参考答案：B
In some cities, the junior pupils look forward to having ______ time to relax and ______ homework to do.
A．less; more
B．more; less
C．fewer; more
D．much; many
免疫病理检查几乎所有SLE病人均可出现病变的脏器是（）
A.心脏
B.肾
C.肺
D.肝
E.胰腺
