问题
单项选择题
7750设备的每个MDA支持最大的100M以太网端口数为（）
A.10
B.40
C.60
D.20
答案
参考答案：C
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7750设备的每个MDA支持最大的100M以太网端口数为（）
A.10
B.40
C.60
D.20
参考答案：C
| 从下列方框中选择短语并用其适当形式填空。 | |
2. He worked hard, now he ______ and confident about the coming mid-term examination. 3. We should not laugh at those who ______ just______ their failure in maths test. 4. He consistently ______ having sports whether how cold it is. 5. If you want to keep fit, you must ______ for at least one hour every day. |