气门传动组由挺杆、推杆、调整螺钉、摇臂轴、()和正时齿轮等组成。
A.气门摇臂
B.气门气门弹簧
C.凸轮轴气门
D.凸轮轴摇臂
参考答案：D
句型转换 按括号中的要求完成句子，每个空格填一个单词。（5分）
小题1:Tom can speak Chinese well. （改为否定句）
Tom _______ ________ speak Chinese well.
小题2:Ellen often flies kites in the park.（对划线部分提问）
________ __________ Ellen often fly kites?
小题3:“What do you often do on weekend?” The girl asked the boy.（改写句子，句意不变）
The girl asked the boy _______ _______often ________ on weekend.
小题4:We use computers more often now, because we can send and receive information conveniently.（改写句子，句意不变）
Computers _______ ________ more often now, because information can be _______ and received conveniently.
特种设备出厂时应当附有哪些资料？
