肾小球滤过膜对血浆蛋白能否通过具有一定选择性称为
A.尿渗量B.选择性蛋白尿C.自由水清除率D.肾小球滤过率E.内生肌酐清除率
参考答案:B
Sequential circuit is a common logic device whose output values, at a given instant, depend upon its input values and the internal state at that instant, and whose internal state depends upon the (66) preceding input values and the preceding internal state. A sequential circuit can assume a finite number of internal states and may therefore be regarded, from an abstract (67) , as a finite (68) .
Combinational circuit is another logic device whose output values, at any given instant, depend upon the input values at that instant. A combinational circuit is a (69) of a sequential circuit whose internal state is not taken (70) .
(70)处填()。
A.calculation
B.in account
C.audit
D.attention
对同一台四冲程非增压柴油机,一般地说()。
A.排气阀面积大于进气阀
B.排气阀面积小于进气阀
C.排气阀寿命大于进气阀
D.排气阀无阀壳而进气阀有阀壳