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【单选题】
从疑为淋病的女性患者以棉试子取样作细菌培养,最佳的取样部位是A.
阴道口
B.
肛门
C.
尿道口
D.
宫颈内
E.
宫颈口
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反馈参考答案：
举一反三
【判断题】The word " finger" is transcribed as /'fiŋgə/ while the word "singer" is transcribed as /'sɪŋə/.
A.
正确
B.
错误
【多选题】How is DNA transcribed into RNA by RNA polymerase in cells?
A.
RNA polymerase moves stepwise along the DNA, unwinding the DNA helix in front of it to expose a new region of the template strand for complementary base-pairing. As it progresses, the polymerase adds ribonucleotides one-by- one to the RNA chain, using an exposed DNA strand as a template. In this way, the growing RNA chain is elongated by one nucleotide at a time in the 5ʹ-to-3ʹ direction.
B.
The resulting RNA transcript is thus single-stranded and complementary to the template strand. The incoming ribonucleoside triphosphates (ATP, CTP, UTP, and GTP) provide the energy needed to drive the reaction forward, analogous to the process of DNA synthesis.
C.
As the polymerase moves along the DNA template, it displaces the newly formed RNA, allowing the two strands of DNA behind the polymerase to rewind.
D.
A short region of hybrid DNA/RNA helix (approximately nine nucleotides in length) therefore forms only transiently, causing a “window” of DNA/RNA helix to move along the DNA with the polymerase.
【单选题】下面关于浮点运算器的描述中,正确的是 。
A.
浮点运算器可用阶码部件和尾码部件实现。
B.
阶码部件可实现加、减、乘、除四种运算。
C.
阶码部件不进行阶码相加、相减和比较操作。
D.
尾码部件只进行乘法和减法运算。
【单选题】下面关于浮点运算器的描述中，正确的是
A.
浮点运算器可用阶码部件和尾数部件实现
B.
阶码部件可实现加、减、乘、除四种运算
C.
阶码部件不进行阶码相加、相减和比较操作
D.
尾数部件只进行乘法和减法运算
【单选题】Considering how jazz is transcribed in Chinese (jueshi), you may be misled into assuming that it is an aristocratic cultural form. Nothing could be further from the troth. It originated among black Am...
A.
actually an aristocratic cultural form.
B.
a cultural form. peculiar to the upper class.
C.
a cultural form. despised by the Americans.
D.
a cultural form. originated in America.
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