性比
参考答案:是指一个雌雄异体的种群所有个体或某个龄级的个体中雄性对雌性的比率(反应了种群产生后代的能力)
单词拼写
根据句意和首字母、汉语提示写出单词的正确形式。
24.Are there any v______for the competition? Please sign here on the paper.
25.It is quite i______to finish the task within two weeks with so few workers.
26.______(如今)a lot of people go abroad.
27.They searched t______the town for the lost child.
28.She was so rich that she was covered with ______(珠宝).
29.In the war, the soldier was badly w______ in the head.
30.Though seemingly ______(凶猛), the dog was gentle really.
31.This is a c________ (易混淆的) word because it has two meanings.
32.The _________(可能性) is that one smoker in four will die from smoking.
33.Such accidents should be ________ (避免)next time.
粘贴防水卷材胶接剂涂刷后,需晾置( )min左右,待基本干燥(手触不粘)后方可进行卷材的粘贴。
A.10B.20C.25D.30