A．ccording to Figure 3, clasts and matrix particles having diameters greater than or equal to 0.5 mm made up approximately what percent of the total mass of the combined samples?

A．13%

B．33%

C．63%

D．83%

[名词解释] matrix (线粒体基质)

[单选题]The unmistakable figure with the moustache most probably represents ______.A． those who died in the warB． those who had wonC． an imaginary figureD． the most hated person in the war--Hitler

[单选题]A．ccording to Paragraph 3,who is the final victim of spam?A． The businessB． The advertiserC．The employeeD．The consumer

[单选题]A．ccording to Paragraph 3,who is the final victim of spam? [ ]A． The businessB． The advertiserC．The employeeD．The consumer

[名词解释] 打分矩阵（scoring matrix）

[名词解释] 点矩阵（dot matrix）

[单选题]The figure that the volume of air at BDC is divided by the volume of air at TDC is termed as（）.A . ignition ratioB . power ratioC . compression ratioD . injection ratio

[单选题]A．ccording to Paragraph 3,one problem with the policy is that it may____.[A]discourage students from doing homework[B]result in students' indifference to their report cards[C]undermine the authority of state tests[D]restrict teachers' power in educ

[多选题] 通常MMC（metal matrix composite）（）A .采用高熔点、重金属作为基体。B .要比基体金属或合金的塑性与韧性差。C .要比基体金属或合金的工作温度高。D .要比基体金属或合金的弹性模量低。

[单选题]The figure below shows a record used for recording information about a named? event.Which of the following statement is incorrect? VAR r:record event:array[1..10] of char; place:array[1..20] of record plname:array[1..15] of char; date: array[1..5] of