【单选题】According to the passage, when docs a trade imbalance occur? When ______.
A.
a country has serious economic problem
B.
a country sells more products overseas than it imports
C.
the value of the products a country imports is greater than the value of the product it exports
D.
a country can't develop its natural resources
【单选题】计算机病毒的传染途径有多种,目前危害最大的传播途径是( )
【单选题】Passage Two Questions 62 to 66 are based on the following passage. When next year’s crop of high-school graduates arrive at Oxford University in the fall of 2009, they’ll be joined by a new face; Andr...
A.
Institutions worldwide are hiring administrators from theU.S.
B.
A lot of political activists are being recruited as administrators.
C.
American universities are enrolling more international students.
D.
University presidents are paying more attention to funding-raising.
【单选题】According to the passage, a teacher's duty is to ______.
A.
provide students with help when it is needed
B.
find out students' mistakes and correcting them
C.
teach students knowledge essential for their future life
D.
help students find out correct answers
【单选题】According to the passage, the sensitive plant's leaves move quickly when parts of the pulvini ______.