【单选题】下列哪个天体是人类发现的第一颗系外行星?( )
【单选题】I have two cats. One is black, and ______ is white.
【判断题】在杭州,人们回去净慈寺敲钟祈福,庆祝新年。
【单选题】车轮动平衡检测时,在一定转速下,平衡仪主轴的振幅大小只与车轮不平衡质量大小
【单选题】 一个普通剪力螺栓在抗剪连接中的承载力是 ______________ 。
【单选题】As to the genetic defects, which of the following statements is NOT true?
A.
Recessive genes play a greater part than dominant genes in genetic diseases.
B.
Hemophilia is caused by genetic defects on the mother's side
C.
All diseases due to genetic defects are passed down from older generations.
D.
Genetic counselors can warn couples that they may or may not have defective chil-dren.
【单选题】1893年,居里夫人以第一名的成绩毕业于(),第二年又以第二名的成绩毕业于该校数学系。