将电视机遥控器对准墙壁按一下开关,有时也可以将关闭的电视机打开。产生这种现象的原

题型:选择题

问题:

将电视机遥控器对准墙壁按一下开关,有时也可以将关闭的电视机打开。产生这种现象的原因是:[ ]

A.可见光不遵从光的反射定律 

B.不可见光的折射现象

C.不可见光的反射现象  

D.凸透镜对光的会聚作用

考点:光的反射现象
题型:选择题

下列关于金融资产和金融市场的说法中,不正确的是()。

A、资本市场的主要功能是进行长期资金的融通,货币市场的主要功能是保持金融资产的流动性

B、金融资产是以信用为基础的所有权的凭证,构成社会的实际财富

C、与实物资产相比,金融资产具有流动性、人为的可分性、人为的期限性和名义价值价值不变性的特点

D、二级市场是一级市场存在和发展的重要条件之一

题型:选择题

函数f(x)=log2(3x-1)的定义域为(  )

A.(0,+∞)

B.[0,+∞)

C.(1,+∞)

D.【1,+∞)

题型:选择题

月经周期为28日,宫颈黏液羊齿植物叶状结晶完全消失,相当于月经周期的()

A.第1日左右

B.第14日左右

C.第18日左右

D.第20日左右

E.第22日左右

题型:选择题

Questions from 31 to 35 are based on the following passage: Generally, cargo is carried in containers, but sometimes it is still shipped as breakbulk cargo. During the voyage, goods may be stacked on top of or come into violent contact with other goods. And the cargo might be dragged, pushed, rolled, or dropped during unloading, while moving through customs, or in transit to the final destination. Moisture is a constant concern because condensation may develop in the hold of a ship even if it is equipped with air conditioning and a dehumidifier(除湿机). Another aspect of this problem is that cargo may also be unloaded in precipitation, or the foreign port may not have covered storage facilities. Buyers are often familiar with the port systems overseas, so they will often specify packaging requirements. If the buyer does not specify this, be sure the goods are prepared using these guidelines: Pack in p containers, adequately sealed and filled when possible. To provide proper bracing in the container, regardless of size, make sure the weight is evenly distributed. Goods should be palletized when possible containerized. Packages and packing filler should be made of moisture-resistant material. To avoid pilferage, avoid writing contents or brand names on packages. Other safeguards include using straps, seals, and shrink wrapping. Observe any product-specific hazardous materials packing requirements. Normally, air shipments require less heavy packing than ocean shipments, though they should still be adequately protected, especially if they are highly pilferable. Finally, because transportation costs are determined by volume and weight, specially reinforced and lightweight packing materials have been developed for exporting. Packing goods to minimize volume and weight while reinforcing them may save money, as well as ensure that the goods are properly packed.

Rough handling in transit will do great harm especially to()

A.containerized cargo

B.breakbulk cargo

C.palletized goods

D.none of the above

题型:选择题

下列选项中属于诞生礼俗的有()

A.求子礼俗

B.催生礼

C.洗三

D.满月礼

E.周岁礼

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