Define with examples phonemic contrast, allophone and complementary distribution. What is the basic way to determine the phonemes of a language
| Recently, I flew to Las Vegas to
attend a meeting. As we were about to arrive, the pilot announced with apology
that there would be a slight (16) before setting down. High
desert winds had (17) the airport to close all but one
runway. He said that we would be (18) the city for a few
minutes waiting to (19) . We were also told to remain in our
seats meanwhile with our seat belts fastened (20) there might
be a few bumps(颠簸). Well, that few minutes turned into about four-five minutes,
including a ride that would make a roller coaster(过山车) (21)
by comparison. The movement was so fierce that several passengers
felt (22) and had to use airsickness bags. As you might
guess, that’ s not a good thing to have happen in a(n) (23)
space because it only (24) to increase the discomfort of the
situation A. is happy to clean windows B. loves to clean used windows C. is fond of cleaning used windows D. likes to clean windows as my mother did [单选题]张力机导线轮直径不宜小于导线直径的（）。
A.40 B.30 C.35 D.45。 [单选题]运动状态下,学员注视的焦点前移,复合视野的范围变窄,称为( )。
A.静止视力 B.静视野 C.动视野 D.动态视力 [单项选择]宏观调控的目标是( )。
A. 实现社会总供给的发展 B. 促进社会总需求的提高 C. 实现社会总供给和总需求的平衡 D. 实现社会财富的极大化 [多项选择]关于清创术，下列哪几项是正确的（）。
A. 清创术最好在伤后6-8小时内施行 B. 污染较轻的伤口，伤后12小时一般仍可一期缝合 C. 超过12小时的伤口，清创后一般不予缝合 D. 面颈部、关节附近、神经血管暴露的伤口，即使超过24小时，仍应缝合 E. 战地伤口早期，可作一期缝合 [单项选择]用计算机替代手工记账，必须经过计算机与手工核算并行的时间至少是( )。
A. 1个月 B. 3个月 C. 6个月 D. 1年 [单选题]杆塔基础有钢筋外露为（____） 。
A.一般缺陷 B.严重缺陷 C.危急缺陷 [单选题]借贷记账法的会计恒等式为()
A.（A）资产+负债=所有者权益 B.（B）资产+所有者权益=负债 C.（C）负债+所有者权益=资产 [判断题]将氯气通入水中可获得次氯酸。( )
A.正确 B.错误 [单选题]躯体运动性脑神经核不包括
A.展神经核 B. 舌下神经核 C.滑车神经核 D.迷走神经核 E.动眼神经核 [单选题]易燃液体的沸点低,挥发出来的蒸汽与空气混合后,浓度易达到( ),遇火源往往发生爆炸。
A.爆炸下限 B.爆炸上限 C.着火下限 D.着火上限 [单项选择]在低矿化水中，阴离子以重碳酸盐为主，阳离子以钙离子、镁离子为主。随着蒸发浓缩，溶解度小的钙、镁的碳酸盐部分析出，硫酸根及钠离子逐渐成为主要成分，继续浓缩，水中硫酸盐达到饱和并开始析出，便将形成以氯离子、（）为主的高矿化水。
A. 铁离子 B. 钠离子 C. 负离子 D. 正离子 [单选题]使用钳形电流表测量高压电缆各相电流，电缆头线间距离应大于（ ）mm，且绝缘良好、测量方便。当有一相接地时，禁止测量。
A.量程 B.规格 C.电压等级 D.参数 我来回答: 提交
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