【单选题】Passage 3 The United States is on the verge of losing its leading place in the world's technology. So says more than one study in recent years. One of the reasons for this decline is the parallel decl...
A.
a. the number of PH.D. degree holders is declining
B.
b. the number of scientists and engineers is decreasing
【简答题】The United States is on the verge of losing its leading place in the world’s technology. So says more than one study in recent years. One of the reasons for this decline is the parallel decline in the...