题干

伊伐布雷定(C27H36N2O5)是世界上治疗心脏病的最新药物之一.下列有关伊伐布雷定的说法错误的是(相对原子质量:H﹣1  C﹣12  N﹣14  O﹣16)(  )


A:伊伐布雷定由70个原子构成

B:伊伐布雷定属于有机化合物

C:伊伐布雷定由4种元素组成

D:伊伐布雷定的相对分子质量为468

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答案(点此获取答案解析)

A

同类题3

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

Ways to protect cell phones from damage

    While people use cell phones frequently, very few take the necessary measures to prevent damage. ____ Here are some simple ways for you to protect your cell phone from damage.

Keep cell phones out of the rain

    If you must talk on the phone while it's raining, try to move indoors.  ____ Otherwise, you may have trouble with the numbers or the cell phone speaker. Imagine dialing (拨打) one number and getting different results.

____

    Many people like to put their cell phones in the pants or jeans pocket. However, storing a cell phone there will put it at risk of damage. You may forget that it is still in your pocket and just sit on the cell phone. As a result, your cell phone screen will get damaged.

Do not handle cell phones while eating

    ____ This is especially true for those times when you are eating messy things and get the ingredients on your hands. One accident can cause lots of damage for your cell phone.

Get a protective cell phone case

    There are many kinds of cases available on the market. ____ It will provide a protective cushion (垫子) that may save you from paying money to fix or buy a new phone.

A. Do not put cell phones in your pocket

B. Do not throw cell phones onto hard surfaces

C. Many people often talk on the phone in the rain.

D. You can also cover the phone up with your hand.

E. Just choose one that fits the size of your cell phone.

F. One mistake may end up costing you more money.

G. Food and drinks should not be near your cell phones.