不论跨国纳税人的收入源于何国，只要是本国居民，就要对其全部收入予以征税，这属于（）。

出现柏油便时，考虑出血的原因最可能为（）。

A.结肠癌

B.内痔

C.直肠癌

D.十二指肠球部溃疡

E.肠结核

关于感染性休克的病因治疗，下列说法哪些错误（）

A.应静脉给药

B.剂量宜较大，首次可用加倍量

C.根据药敏结果选用强有力的抗菌谱广的杀菌剂进行治疗

D.早期应用抗内毒素血清治疗

E.联合应用两种药为宜

   We are now living in the modern society. Most of the energy we use for heating, lighting, transportation and manufacturing (制造业) comes from fossil (化石) fuels. These are carbon-based fuels from oil, coal and natural gas. When we burn these fuels we release heat which p__小题1:___ the energy.

There are three main disadvantages to using these fuels. Firstly, they are causing climate problems because of the G_小题2:___ Effect. When we burn fossil fuels they produce carbon dioxide which causes global warming. Secondly, when we have used up all our coal, oil and natural gas, we will have n__小题3:__ left to burn. Thirdly, they are not very efficient. The internal combustion engine (内燃机) that we use in most cars, trucks and buses, for example, is only about 14% efficient.

Scientists are working on another fuel—hydrogen. There are a couple of advantages to using hydrogen as a fuel. Firstly, because two-thirds of the e__小题4:__ surface is water and water is made of hydrogen and oxygen. There is an almost unlimited supply of hydrogen. Secondly, burning hydrogen does not cause global warming. Thirdly, it is much more efficient than carbon-based fuels.

Unfortunately there are problems with hydrogen at the present time: there is the problem of separating (分离) it from water c_小题5:___, and there is the difficulty of storing it. It can be stored under pressure but high pressure tanks are far from safe. It can also be stored as a liquid but only at extremely low temperatures. It seems likely, therefore, that there will have to be a completely new technology before hydrogen replaces fossil fuels. S__小题6:___ these problems is an urgent (急迫的) matter. Although China, India and Australia have huge amounts of cheap coal, and there are still l__小题7:___ oil and gas reserves(储藏量) elsewhere, the effects on the planet’s climate will be bad if they are used.

皮带机司机应严格执行有关规章制度，遵守（），服从（），听从指挥。

患者女，67岁，全牙列缺失，全口义齿修复。

影响全口义齿固位的因素不包括

A．颌骨的解剖形态

B．口腔黏膜的性质

C．基托边缘伸展的范围，厚薄和形态

D．唾液的质和量

E．排列人工牙的大小