不同种类的植物含水量不同，一种植物的含水量大于90%，该植物可能是[ ]
A．水生植物
B．草本植物
C．木本植物
D．干旱环境中的低等植物
答案：A
After several years of observation, the research group ______ the conclusion that language acquisition is
faster when students ______ to the situation where it is spoken.[ ]
A. has come to; expose
B. have arrived at; are exposed
C. has concluded; are exposed
D. have reached; expose
绘制机械图样时，尽量采用1：1的比例
