单选题：The attitude of the author towards the research project is

题目内容：

The attitude of the author towards the research project is A．positiv
B．negativ
C．suspiciou
D．indifferen

参考答案：

答案解析：

Which country is the largest coffee producer?

Which country is the largest coffee producer?A．Brazi B．Colombi C．Ethiopi D．Egyp

分类：理工类题型：单选题

分类：理工类题型：单选题

牙骨质龋属于（　　）。A．中龋 B．浅龋 C．慢性龋 D．深龋 E．继发龋

分类：理工类题型：单选题

You have to be patient if you want to sustain your position.A．maintain B．better

分类：理工类题型：单选题

Some industrialized countries are unwilling to spend money in reducing pollution

分类：理工类题型：单选题