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【单选题】
A group of mice was released into a large field to which no other mice had access. Immediately after the release, a representative sample of the mice was captured, and the fur color of each individual in the sample was observed and recorded. The mice were then returned to the field. After twenty years, another representative sample of the mice was captured, and the fur color of each individual in the sample was again recorded. Which of the following best explains the change in the frequency distribution of fur color phenotypes in the mouse population, as shown in the figures above?A.
The allele for gray fur color is unstable, and over twenty years most of those alleles mutated to become alleles for black fur.
B.
The field was composed primarily of light-colored soil and little vegetation, affording gray mice protection from predators.
C.
Sexual selection led to increased mating frequency of black and brown versus gray and brown.
D.
The gray mice were hardest to capture and so were underrepresented in the twenty-year sample.
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【简答题】中央提出脱贫攻坚到2020年要实现的“两个确保”目标是什么?
【多选题】甲公司按合同规定销售产品一批,开出增值税专用发票上标明价款为10000元,增值税税额为1700元,产品已发出。之前已预收购货单位货款8000元,预收款不足部分购货单位暂欠。对于该交易的下列会计处理中,正确的有( )。
A.
贷记“主营业务收入”10000元
B.
借记“预收账款”11700元
C.
贷记“应交税费”1700元
D.
借记“预收账款”8000元
【多选题】甲公司按合同规定销售产品一批,开出增值税专用发票上标明价款为10000元,增值税税额为1700元,产品已发出。之前已预收购货单位货款8000元,预收款不足部分购货单位暂欠。对于该交易的下列会计处理中,正确的有( )。
A.
贷记“主营业务收入”10000元
B.
借记“预收账款”11700元
C.
贷记“应交税费-应交增值税(销项税额)”1700元
D.
借记“预收账款”8000元
【单选题】某34岁女士，孕11周，出现阵发性下腹痛，阴道排出一大块肉样组织，继而阴道大量出血。目前贫血貌，体温37．2℃。妇科检查：宫口已开，有组织堵塞宫口，子宫较孕周略小，其最可能的诊断是：
A.
先兆流产
B.
稽留流产
C.
感染性流产
D.
难免流产
E.
不全流产
【多选题】甲公司按合同规定销售产品一批,开出增值税专用发票上标明价款为10000元,增值税税额为1700元,产品已发出。之前已预收购货单位货款8000元,预收款不足部分购货单位暂欠。对于该交易的下列会计处理中,正确的有( )。
A.
贷记“主营业务收入”10000元
B.
借记“预收账款”11700元
C.
贷记“应交税费--应交增值税（进项税额）”1700元
D.
借记“预收账款”8000元
【单选题】某女士，34岁，孕11周，出现阵发性下腹痛，阴道排出一块肉样组织，继而阴道大量出血。目前贫血貌，体温37．2℃。妇科检查：宫口已开，有组织堵塞宫口，子宫较孕周略小，其最可能的临床诊断是
A.
先兆流产
B.
难免流产
C.
不全流产
D.
稽留流产
E.
感性流产
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