模型组命令下包含以下哪个功能（ ）
A. 放置构件
B. 创建组
C. 创建详图组
D. 作为组载入到打开的项目中
Under no ________ should you read any part of these jokes if you have a heart condition.
A. circumstances
B. means
C. condition
D. responsibility
The problem will be discussed at length in _________ chapters.
A. previous
B. above-mentioned
C. consequent
D. subsequent
Finding a job can be _________ and disappointing, and therefore it is important that you are prepared.
A. exploiting
B. frustrating
C. profiting
D. arbitrary
微信支付 
支付宝支付