【单选题】一般来讲,谷物中的第一限制性氨基酸为( )。
【简答题】What is a generally suggested minimum sample size for a group in a causal-comparative study or correlation study?
【单选题】When economists talk about growth in the economy, they measure that growth as the
A.
absolute change in nominal GDP from one period to another.
B.
percentage change in nominal GDP from one period to another.
C.
absolute change in real GDP from one period to another.
D.
percentage change in real GDP from one period to another.
【简答题】质量m的匀质细丝,在平面上弯曲成两个半径同为R的相切连接的半圆形状,如图所示。过左半圆周中点A设置垂直于圆平面的转轴,试求弯曲细丝相对此转轴的转动惯量I A 。
【单选题】Creating a new chip design or a new software program is a ____ effort that relies almost exclusively on well-paid domestic workers.
【简答题】Why the manufactures did not accept the new design.