间脑的（）和（）是内分泌器官。
参考答案：脑垂体；松果体
Scientists _____ DNA from one kind of plant and _____ it into another kind of plant to make a pretty new one. [ ]
A. take, give
B. make, put
C. make, give
D. take, put
抽烟式探火系统的取样风机及管道是用以将各货舱空气抽送至感烟探测器；取样风机应装有（）套.
A.2
B.3
C.4
