昆虫生命表有那几种类型?
参考答案:
昆虫的生命表按其用途、内容可分为两大类,即特定年龄生命表和特定时间生命表,后一类型又有自然种群核实验种群之分。
The boy was able to __________ himself when he was very young.
A.dress
B.wear
C.put on
D.wears
属于手太阳小肠经的腧穴是()
A.听会
B.听宫
C.耳门
D.神门
E.下关