图中的仙人掌类植物是应用那种方式培育的( ) A.嫁接 B.扦插 C.组织培养

题型:选择题

问题:

图中的仙人掌类植物是应用那种方式培育的(  )

A.嫁接

B.扦插

C.组织培养

D.有性生殖

考点:植物的无性生殖
题型:选择题

消化性溃疡的命名是由于()

A.溃疡位于消化道

B.溃疡影响消化功能

C.溃疡局限于胃和十二指肠

D.溃疡由消化道功能紊乱引起

E.溃疡的形成有胃酸和胃蛋白酶的消化作用参与

题型:选择题

已知函数,则等于()。

A.2x+2y

B.x+y

C.2x-2y

D.x-y

题型:选择题

根据所给词的适当形式填空。

小题1:90% of the class enjoyed ____________ (he) during the winter holiday.

小题2:It is______________ (possible)for me to design the poster without your help.

小题3:The police ________ (search) the robber at that time last night.

小题4:When I got to the theater, I realized that I _________ (leave) the ticket at home.

小题5:December is the __________ (twelve) month of a year.

小题6:You'd better plan your free time ________(wise). Don't play too many computer games.

小题7:——What do your father and uncle do?

——They are __________ (salesman) and they sell all kinds of robots.

小题8:——I want to teach in the western areas.

——Well, teachers ____________ very much there. (need )

小题9:Look! There is a new ___________ (wash) machine near the window.

小题10:My cousin refused ___________ (keep) secrets for me.

题型:选择题

明龙骨吊顶工程安装的允许偏差和检验方法(mm)

根据以上表格,完成下面问题:

上面表格中“接缝高低”允许偏差的数值错误的是()

A、纸面石膏板

B、金属板

C、矿棉板

D、木板、塑料板、格栅

题型:选择题

部件类型区分号在零件编码系统中代表纵向布置部件的符号是()。

A.V

B.P

C.L

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