同轴电缆
参考答案：
由一条中央导线，一组外围导线及保护层组成之电缆。同轴电缆比双绞线更具传输能力，但其有效距离受一定限制。
—How are you getting on with your new roommate?
—I’m no longer _______ with him. He ______ late with TV on every night.
A．satisfied; is staying up
B．unhappy; is getting up
C．anxious; is making up
D．helpful; is using up
降低胃内酸度作用最强的药物是
A．含铝抗酸剂B．H2受体拮抗剂C．质子泵抑制剂D．抗胆碱能药物E．胃泌素受体拮抗剂
