皮皮学,免费搜题
登录
搜题
【简答题】
阅读理解。 Motor racing is a very exciting sport, but it is also very dangerous. Racing drivers go at 200 kilometers per hour and even faster. Sometimes the cars crash (撞车) and the drivers die. This is Kirsten Kolby. When she was a little girl, she and her brother learned to drive go-Karts, and she became good at it. When she was 12, she was the best young driver in her country. Now she drives racing cars. Most racing drivers are men. Is this a problem for Kirsten? 'Sometimes.' is her answer,' Some men don't like a woman driver in front of them. They get angry.' Is she afraid of crashing? 'I had a bad crash two years ago. The car rolled over. I was under it and I couldn't move. There was a fire, and I couldn't get out. A man rushed through the fire and pulled me out . He was a very brave man. After I came out of hospital, I tried to race again, but I was too afraid of fire. So I stopped racing and got a different job. But I wasn't happy. I really wanted to race again. I wanted it very much. So now I'm racing again. I'm still afraid, but I'm stronger than my fear.' 阅读短文,根据短文内容,完成下列任务. 任务一:回答问题. 1. Are racing drivers safe? _____________________________________________ 2. What happened to Kirsten two years ago? _____________________________________________ 任务二:将文中画线句子译成汉语. 3.___________________________________ 任务三:完成句子.(每格一词) 4. Kirsten became the best young driver in her country when she was _____ _____ _____. 5. After Kirsten came out of hospital, she _____. A. tried to race again B. gave up racing and changed a new job C. was unhappy D. went on racing
拍照语音搜题,微信中搜索"皮皮学"使用
参考答案:
参考解析:
知识点:
.
..
皮皮学刷刷变学霸
举一反三
【判断题】谏院在宋初不是独立机构。()
A.
正确
B.
错误
【判断题】恰当使用微笑可以使人际关系更加和谐。()
A.
正确
B.
错误
【单选题】一定温度下,三种碳酸盐MCO 3 (M 2+ :Mg 2+ 、Ca 2+ 、Mn 2+ )的沉淀溶解平衡曲线如下图所示。已知: p(M 2+ )=-lg c(M 2+ ),p(CO 3 2 - )=-lg c(CO 3 2 - )。下列说法正确的是
A.
MgCO 3 、CaCO 3 、MnCO 3 的K sp 依次增大
B.
在100mL MgCO 3 、CaCO 3 、MnCO 3 饱和的混和溶液中加入足量浓K 2 CO 3 溶液,产生沉淀MnCO 3 质量最多
C.
b点可表示CaCO 3 的饱和溶液,且Ca 2+ 浓度与CO 3 2 - 浓度相等
D.
c点若表示MgCO 3 则为不饱和溶液,若表示CaCO 3 则有沉淀析出
【简答题】准时制( Just In Time ,简称 JIT )分 准时生产制和准时采购制 。 准时采购制 是在 的基础上发展起来的。
【判断题】发电机电压输出端B+端子上电缆应连接可靠。
A.
正确
B.
错误
【单选题】一定温度下,难溶电解质CaCO 3 在水中的沉淀溶解平衡:CaCO 3 ⇌Ca 2+ +CO 3 2 - ,其平衡常数K sp =c(Ca 2+ )•c(CO 3 2 - ),称为CaCO 3 的溶度积。该温度下,向CaCO 3 悬浊液中加入少量水,下列叙述正确的是( )
A.
CaCO 3 的溶解平衡不移动
B.
CaCO 3 的K sp 不变
C.
c(Ca 2+ )增大
D.
CaCO 3 的溶解度增大
【单选题】下列哪点不是高血压的治疗目的及原则:
A.
控制血压于正常水平
B.
减少致死性及非致死性并发症
C.
根据高血压程度选用药物
D.
根据并发症选用药物
E.
剂量不需调整
【简答题】(4分)已知某碱溶液的溶解度随温度升高而增大;温度一定时,该碱溶液的浓度越大,其碱性越强。 (1)要使该碱饱和溶液的pH升高(溶质不变),可采取的方法是 。 (2)要使该碱饱和溶液的pH降低,在下列试剂中,哪些可选择加入? A.CO 2 B.CaCO 3 C.Fe(OH) 3 D.CuSO 4
【单选题】一定温度下,三种碳酸盐MCO 3 (M:Mg 2 + 、Ca 2 + 、Mn 2 + )的沉淀溶解平衡曲线如下图所示。已知: pX=-lgc(X)。下列说法正确的是
A.
在该温度下,MgCO 3 、MnCO 3 的溶解度依次增大
B.
d点可表示MnCO 3 的过饱和溶液,且c(Mn 2 + )>c(CO 3 2 - )
C.
b点可表示CaCO 3 的饱和溶液,且c(Ca 2 + )<c(CO 3 2 - )
D.
c点可表示MgCO 3 的不饱和溶液,且c(Mg 2 + )>c(CO 3 2 - )
【单选题】下列说法不正确的是 [     ]
A.
升高温度,一定浓度的醋酸溶液中醋酸的电离平衡常数增大(不考虑醋酸挥发)
B.
硫酸钙微溶于水,碳酸钙难溶于水,由此推知Ksp(CaCO 3 )>Ksp(CaSO 4 )
C.
已知25℃时Ksp[Fe(OH) 3 ]=4.0×10 -36 ,则中性溶液中Fe 3+ 不存在(不存在是指离子浓度小于1×10 -5 mol.L -1 )
D.
氢氧化镁悬浊液中混有少量氢氧化钙,在其混合物中加入足量氯化镁溶液充分搅拌、过滤、洗涤得到氢氧化镁
相关题目: