心电图上有完全代偿间歇的心律失常是（） A.房性过早搏动 B.心房颤动 C.室性过早

短文改错﹙10分﹚

Though great progress have been made in science these years, there are still many people live in poor conditions. They make their lives by collecting or selling used things. Their children cannot go to school because they had not enough money to send their children there. How do you think so many people still suffer from poverty now? The answer lies on the population explosion﹙人口大爆炸﹚. A president of a developing country once said, “It is us who are to blame for the poverty because we used to ‘produce’ child without limit.” Although this few words sound simple enough, they have clear pointed out one of the causes of the population explosion.

下面属于有性生殖的是（　　）

A．马铃薯块茎发芽生根

B．柑橘枝条的嫁接

C．葡萄枝条的扦插

D．玉米种子发育成幼苗，再形成种子

当探伤小车处于放下状态时，如果探伤车丧失了液压源，可以用（）紧急提升泵升起小车。

A、12V直流电

B、24V直流电

C、220V交流电

D、380V交流电

甲状腺大部切除术后手足抽搐，心电图Q-T间期延长，正确处理是（）

A.静脉补镁

B.先静脉10%葡萄糖酸钙10ml，后口服

C.静脉补钾

D.静注地西泮

E.静注硫喷妥钠

商检机构根据便利对外贸易的需要，可以按照国家规定对列入目录的出口商品进行出厂前的质量监督管理和检验。