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survivor—survivors
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professionalism
单项选择题
According to the passage, which of the following should be encouraged to enhance learning of math and science 1. Problem solving. 2. Actual research. 3. Repetitive in-class drills. 4. Group work. 5. Rote learning.
A．l and3.
B．1, 2 and 4.
C．4 and 5.
D．2, 3 and 5.
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