关于IgG的叙述，哪一些是正确的()A．有四个亚类 B．大多数抗毒素抗体属于IgG

除了标的指数成分国债和备选成分国债，国债ETF还可以投资于（）。

A.国债逆回购

B.短期融资券

C.房地产信托

D.国债期货

第三部分：翻译（满分15分）

第一节将下列句子翻译成汉语（共5小题；每小题1分，满分5分）。

66. Tricycles are worth using if you want to explore the narrow alleys (hutong) of old Beijing.

67. Like other animals, we are on guard until we know it is safe to relax.

68. They say that the low-temperature lake is unlikely to be able to support such large living creatures.

69. The tubes were attached to a long stick which helped keep the rocket moving in a straight direction.

70. Distance surgery will become common as doctors carry out operations from thousands of miles away, with each city having its own telesurgery outpatient clinic.

运用收益现值法评估机器设备的前提条件是，被评估机器设备具有独立的、能连续用货币计量的可预期收益，所以单件设备比较适合使用这种方法。

故意遮挡、污损机动车号牌的，（）并处200元罚款。

A.记12分

B.处警告

C.扣留机动车

D.拘留驾驶人

“自强号”平台上的加热系统是以（）为热载体的锅炉供热系统

A、高温水

B、高温高压水

C、蒸汽

D、导热油