正确答案: A

y=-x3

题目：下列函数中，为奇函数的是（　）

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学习资料的答案和解析：

[单选题]“呕出一颗心来，——在我心里!”此诗句出自（　　）

闻一多《发现》

[单选题]What job will be done the day before the festival begins?

回答下面的题目Student Volunteers Needed!On Saturday, December 12th,from 10 A．M．until 4 P． M． , Carverton Middle School will be holding a music festival in the school gymnasium． The special event will feature a variety ofprofessional musicians and singers．TaskTimeDateMake posters1 P．M．一4 P．M．December 5thSet up gym11 A．M．一4 P．M．December 1thHelp performers9 A．M．一4 P．M．December 12thWelcome guests10 A．M．一2 P．M．December 12thClean up gym4 P．M．一7 P．M．December 12thInterested students should speak with Ms．Braxton,the music teacher．Students who would like to help at the festival must have written permission from a parent or guardian．What time will the festival begin?

Setting up the gym．

解析：音乐节的头一天应该做什么。12日举行音乐节，头一天应是11日。表格的第二行，把体育馆布置好。选项B是正确的。

[单选题]__________

根据以下内容，回答下面的题目。Investors can _51_ money simply by loaning it．The money they loan is called capital．Security (担保) is an expensive item which the borrower mortgages (抵押) to the investor to show that he intends to _52_ the debt．The way investors make money on loans is to charge interest．Interest is money that _53_ pay to investors for the use of their money．Interest is usually a certain percentage of the capital．Investors sometimes _54 ten percent or more interest per year．The interest may be calculated daily, monthly, or yearly．The interest must be _55_ before the capital can be repaid．If the interest is not _56_ the agreed rate, the interest is added _57_ the capital．Then the borrower has _58_ pay interest on the unpaid interest _59_ on the capital．A debt can grow quickly this way．If the total of the capital and accumulated interest gets too high, the investor will take _60_ of the item used as security and sell it to get his money back．__________

borrowers

[单选题]All things________，the planned trip will have to be called off．

considered

[单选题]两封信随机地投入标号为1，2，3，4的4个邮筒，则1，2号邮筒各有一封信的概率等于

[多选题]门静脉所收集血液的脏器是（　　）

脾、胰和胆囊

胃和肠

[多选题]下列因素中影响损伤修复的是（　　）

长时间休克

使用大量糖皮质激素

伤口内有异物或坏死组织

体内铜、铁、锌缺乏

[多选题]兴奋通过突触传递特征的叙述，错误的是（　　）

突触传递需要的时间与冲动传导差不多

在中枢神经系统内，只有兴奋可以发生总和，而抑制不会产生总和

在反射活动中，传入神经上的冲动频率往往与传出神经发出的冲动频率一致

[单选题]左心房黏液瘤（　　）

根据以下选项，回答下面的题目：A．舒张期隆隆样杂音B．S2固定分裂 C．S2递分裂D．心包叩击音E．S2通常分裂 缩窄性心包炎（　　）