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问题 多项选择题

对声门型喉癌描述正确的是（）.

A.在喉癌中最常见

B.多发生于声带的前1／3～1／2处

C.病理类型多为高分化鳞癌

D.早期声门癌淋巴结转移少见

E.声门癌单纯放疗的疗效与手术相当

答案

参考答案：A, B, C, D

解析：声门癌在喉癌中占50-60%，多发生于声带前13-12处，病理类型多为鳞状细胞癌，分化较好，声门癌淋巴引流少，早期淋巴结转移少。早期声门癌单纯放疗与手术疗效相似，但T3的声门癌单纯放疗疗效较差，治疗以手术+放疗为主。

单项选择题

有限责任公司的注册资本人民币200万元以上，合伙企业的出资额人民币120万元以上的房地产估价机构资质等级为（）。

A.暂定等级

B.一级

C.二级

D.三级
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单项选择题

Here is a new idea in agricultural weed control. Rather than trying to formulate herbicides that kill specific weeds but are harmless to grain crops, use a broad-spectrum herbicide effective against all kinds of plants and use genetic engineering specifically to make the crops impervious to the herbicide.
Which of the following, if true, is the most serious obstacle to an implementation of the new idea outlined above

A．Certain herbicides that are effective against specific weeds can inhibit the growth of certain crops as much as two years after application.

B．Research to date suggests that the nutritional properties of crop plants would not improve as a result of the genetic alterations being contemplated.

C．Most herbicides that kill only a narrow range of targets contain active ingredients that are harmful to domestic animals and wildlife.

D．Effective broad-spectrum herbicides are on the market, but their very effectiveness has so far rendered them unsuitable for agricultural weed control.

E．(E) Although genetic modification has made individual plants of grain species resistant to broad-spectrum herbicides, the seeds that such plants produce will not sprout.
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