下腰背痛伴白带过多，而月经正常，最可能的疾病是（）。 A.痛经 B.卵巢肿瘤 C.宫

下列说法正确的是( )。

A．抵押人是指接受房地产抵押作为债权人履行债务担保的公民、法人或者其他组织

B．抵押权人是指依法取得的房地产提供给抵押权人，作为本人或者第三人履行债务担保的公民、法人或者其他组织

C．预购商品房贷款抵押，是指购房人在支付首期规定的房价款后，由贷款金融机构代其支付其余的购房款，将所购商品房抵押给贷款银行作为偿还贷款履行担保的行为

D．在建工程抵押，是指抵押权人为取得在建工程继续建造资金的贷款，以其合法方式取得的土地使用权连同在建工程的投入资产，以不转移占有的方式抵押给银行作为偿还贷款履行担保的行为

带电粒子以一定速度垂直射入匀强磁场，若只考虑洛伦兹力，则粒子一定（　　）

A．动能不变

B．做匀速直线运动

C．速度不变

D．加速度不变

The speed and convenience of modern travel means that destinations that used to take a long time to travel to can now be reached quickly and easily. Even though” faraway” countries may now seem closer thanks to air travel, they may still be different from your home country. 小题1:  Following are some fundamental rules that will make communication easier, and your trip more enjoyable.

小题2:   If you don not know the word for something in local language, or can not make yourself understood verbally, try drawing a picture, or pointing to an object.

Avoid topics of conversation that you think may be sensitive. 小题3:  .Feel free to show interest in the history and customs of the place you are visiting, but don’t ask too many questions about why things are done a certain way; you may offend the local people.

    小题4:  Kissing on the street or in public places is unacceptable behavior and should be avoided. If you are unsure of how to behave, watch the local people and copy them---if they don’t behave in a certain way, you probably shouldn’t either.

Finally, if you are traveling on business, or plan to stay with a host to family, and you wish to take a gift, do some research.   小题5:    . One of the easiest ways to offend somebody is to give the wrong gift.

Wherever you go in the world, always be tolerant of the local customs. Avoid being critical; try instead to show respect for the values of the country you are in, even if you do not necessarily agree with them

A．Keep in mind that in many cultures, display affection in public is considered taboo.

B．Consider the main lifestyle of the country you plan to visit.

C．Never raise your voice in order to make yourself understood.

D．If a topic is sensitive in your own culture, it will more than likely be the same in other cultures.E．The idea of the perfect gift varies greatly from country to country.

F．The opening of gifts is also treated very differently around the world.

G．Therefore, it is important to adapt your behavior not to offend the local people.

进行下列操作后，不能形成溶液的是 [ ]

A、把固体碘放到酒精中

B、把硫酸铜放到水中

C、把氨气通入水中

D、把植物油滴入水中

一个A股证券账户可以允许买卖包括B股在内的各种证券。( )