【单选题】生态系统的基本组成部分是______。
C.
非生物环境要素、植物——生产者有机体、动物——消费者有机体、微生物——分解者有机体
【单选题】When the sentence "The had made a mess of the house" is turned into passive voice, which of the following is CORRECT?
A.
A mess had been made in the house.
B.
A mess had been made by them.
C.
The house had been made a mess of.
D.
The house had been made a mess.
【单选题】It started raining,so she__________ the nearest house.A.made forB.made off
A.
It started raining,so she__________ the nearest house. A.made for
【单选题】When the sentence "They had made a mess of the house" is turned into passive voice, which of the following is CORRECT?
A.
A mess had been made in the house.
B.
A mess had been made by them.
C.
The house had been made a mess of.
D.
The house had been made a mess.
【单选题】The burglars broke into his house and______before the police arrived.
【单选题】猪丹毒时,猪皮肤上出现红色火烙印样疹块,按压褪色,该病变属于