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【单选题】
我国《预防未成年人犯罪法》规定，收留夜不归宿的未成年人的，应当征得其父母或者其他监护人的同意，或者在()小时内及时通知其父母或者其他监护人。A.
8
B.
12
C.
24
D.
48
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举一反三
【单选题】下列《断魂枪》的语句中,属于沙子龙肖像描写的是
A.
利落，短瘦，硬棒，两眼明得像霜夜的大星
B.
个子大，一脸横肉，努着对大黑眼珠，看着四围
C.
大刀靠了身，眼珠努出多高，脸上绷紧，胸脯子鼓出，像两块老桦木根子
D.
脑门亮，眼睛亮——眼眶虽深，眼珠可黑得像两口小井，深深的闪着黑光
【简答题】第9章测验题.ppt
【简答题】第6章测验题.ppt
【简答题】第11章测验题.ppt
【多选题】How do mitogens stimulate cell division by promoting entry into S phase?
A.
Most mitogens are secreted signal proteins that bind to cell-suce receptors. When activated by mitogen binding, these receptors initiate various intracellular signaling pathways that stimulate cell division.
B.
These signaling pathways act mainly by releasing the molecular brakes that block the transition from the G1 phase of the cell cycle into S phase.
C.
Most mitogens have been identified and characterized by their effects on cells in culture. One of the first mitogens identified in this way was platelet-derived growth factor, or PDGF, the effects of which are typical of many others discovered since. When blood clots form (in a wound, for example), blood platelets incorporated in the clots are stimulated to release PDGF.
D.
PDGF then binds to receptor tyrosine kinases in surviving cells at the wound site, stimulating these cells to proliferate and help heal the wound. In a similar way, if part of the liver is lost through surgery or acute injury, a mitogen called hepatocyte growth factor helps stimulate the surviving liver cells to proliferate.
【单选题】I didn't go outing on National Day because the bad weather _____ the difficulty. [ ]
A.
added up
B.
added to
C.
added up to
D.
added
【简答题】第12章测验题.ppt
【简答题】第1章测验题.docx
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