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【单选题】
人体有保卫自身的三道防线．下列免疫活动中属于特异性免疫的是（ ）A.
唾液中的溶菌酶溶解病菌
B.
皮肤的分泌物杀灭部分病原体
C.
脾脏中的吞噬细胞将病菌吞噬、消化
D.
乙肝病毒与相应抗体结合而被清除出
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【简答题】What kind of bus company is the Greyhound bus companyIt is ______ bus company.
【简答题】贝多芬1770年出生于( )，超凡的音乐才能和狂热的创作激情，使他成为音乐世界的普罗米修斯，他成了正义的化身并给人以光明和希望。最能体现其交响乐成就的当属（ ）。
【简答题】2-7 根据已知条件画出直线AB的三面投影。
【单选题】以下对概率的理解,正确的是:
A.
一定条件下随机事件发生可能性大小的度量指标
B.
在多次观察中发生该事件次数与观察总次数的比值
C.
一般用P表示,取值0
D.
一定条件下某事件的发生概率是变化的
E.
某事件的发生频率应该等于其发生概率
【单选题】It can be inferred from the passage that, had the Civil Rights movement not prompted an investigation of prison conditions, ______.
A.
states would never have established asylums for the mentally ill
B.
new treatments for major mental illness would have likely remained untested
C.
the Civil Rights movement in America would have been politically ineffective
D.
conditions in mental hospitals might have escaped judicial scrutiny
【单选题】下列选项中关于概率说法错误的是()
A.
概率是指某随机事件发生可能性的大小 时,则该事件为小概率事件
B.
概率用符号P表示
C.
某随机事件发生的频率就是概率
D.
某随机事件发生的概率P≤0.05或P≤0.014.
E.
概率的取值范围为0-1
【单选题】It can be inferred from the passage that, had the Civil Rights movement not prompted an investigation of prison conditions, ______.
A.
states would never have established asylums for the mentally iii
B.
new treatments for major mental illness would have likely remained untested
C.
the Civil Rights movement in America would have been politically ineffective
D.
conditions in mental hospitals might have escaped judicial scrutiny
【简答题】Civil Rights Act
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