常规心电图采用的导联是（）。 A.标准肢体导联和加压肢体导联 B.V1和V2导联 C

蕨类植物具有的器官是（　　）①根；②茎；③叶；④花；⑤果实；⑥种子．

A．①②③④

B．①②③⑤

C．①②③⑥

D．①②③

计算机指令系统中采用不同寻址方式可以提高编程灵活性，立即寻址是指（ ） 。

A．操作数包含在指令中

B．操作数的地址包含在指令中

C．操作数在地址计数器中

D．操作数在寄存器中

You are a project manager for a small project. Your project was budgeted for ￥500,000 over a six-week period. As of today, you’ve spent ￥260,000 of your budget to complete work that you originally expected to cost ￥280,000. According to your schedule，you should have spent ￥300,000 by this point. Based on these circumstances, your project could be best described as ______.

A．ahead of schedule

B．behind schedule

C．on schedule

D．having not enough information provided

简述补体激活的经典途径.

BOOMbox爆炸机进行雷管测试时，按住ARM开关同时按下（）键。

A、GPS

B、CHARGE

C、TEST

D、星号健