单项选择题

一般的，对展弦比，低亚声速飞机比超声速飞机__?
A、小
B、大
C、相等
D、可大可小

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单项选择题

采用节点电压法分析电路，0点是参考点，图中节点1的自电导等于多少西门子？
A、16
B、2
C、1.6
D、0.4

单项选择题

Which of the following is a typical Chinese way of treating guests?
A、Ask the guests to join the cooking.
B、Cook more than enough dishes to treat the guest.
C、Feel angry if the guests are late.
D、Spend time chatting with guests and cook very simple dishes.