【单选题】冲裁多孔冲件时,为了降低冲裁力,应采用( )的方法来实现小设备冲裁大冲件。
【单选题】为防止手术刀片生锈,用戊二醛浸泡前应在溶液中加入( )。
【单选题】冲裁多孔冲件时,为了降低冲裁力,应采用()的方法来实现小设备冲裁大冲件。
【单选题】I enough money yesterday, I would have bought you the necklace.
【单选题】用戊二醛浸泡手术刀片,为防止生锈,应在溶液中加入
【单选题】It could logically be assumed that the author of this passage would support legislation to ______.
A.
ban the use of all fertilizers
B.
prevent the use of automobiles in the dries
C.
build additional conventional power plants immediately
D.
organize an agency to coordinate efforts to cope with environmental problems
【判断题】定义主键约束的关键字是primary key。
【单选题】下面关于PRIMARY KEY(主键)约束的描述正确的是( )。
【单选题】From the first paragraph, we can know that
A.
Edward Kennedy is leaving office in January.
B.
the proposal was submitted by George Miller.
C.
the Bush Administration will kill the proposal.
D.
Edward Kennedy is a leader of the Congress's labor committees.