皮皮学，免费搜题
登录
搜题
【简答题】
配制0.25mol/L的NaOH溶液100mL,某学生操作如下: (1)用托盘天平称取1.00gNaOH:将天平调好零点,再在两放一张相同质量的纸,把游码调到1.00g的位置上,与放NaOH固体至天平平衡,取下称好的NaOH,并撤掉两的纸。 (2)把称好的NaOH放入一只100mL的烧杯中,加入约10mL水,搅拌使之溶解,溶解后立即用玻璃棒引流,将溶液移至一只100mL的容量瓶内,加水至离刻度线约2cm处,用胶头滴管加水至刻度线。 (3)写出一个标有配制日期的“0.25mol/L NaOH溶液”的标签,贴在容量瓶上,密闭保存。 指出上述操作中的7处错误:
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
【简答题】已知f（x）是偶函数，当x＜0时，f（x）=x（2x-1），则当x＞0时，f（x）=______．
【简答题】已知f（x）是偶函数，当x≥0时，f（x）=-x 2 +4x，求当x＜0时，f（x）=______．
【简答题】已知f（x）是定义在R上的奇函数，且当x＞0时，f（x）=-x 2 +x+1．则当x=0时，f（x）=______；当x＜0时，f（x）=______．
【多选题】Your company has a network that has an active directory domain. The domain has two servers named DC1 and DC2. You plan to collect events from DC2 and transfer them to DC1. You configure the required s...
A.
Run the wecutil qc command on DC1.
B.
Run the wecutil qc command on DC2.
C.
Run the winrm quickconfig command on DC1.
D.
Run the winrm ruickconfig command on DC2.
E.
Add the DC2 account to the administrators group on DC1.
F.
Add the DC1 account to the administrators group on DC2.
【简答题】设F(x)是f(x)的一个原函数， ，若当x＞0时，有 试求f(x)．
【简答题】设f(x)是R上的函数，且f(－x)=' --' f(x)，当x∈［0,+∞)时，f(x)=x(1+ ),那么当x∈(－∞,0)时，f(x)=_ ；
【简答题】设 ，当x→______时f(x)是无穷大量，当x→______时f(x)是无穷小量．
【单选题】You work as the enterprise exchange administrator at Company.com.The Company.com network consists of a single Active Directory domain named Company.com.Company.com has an Exchange Server 2010 organiza...
A.
The best option is to create an accepted domain.
B.
The best option is to create an e-mail address policy.
C.
The best option is to create a Receive connector.
D.
The best option is to create an address rewrite entry.
【单选题】An employee of ABC company has move to an office on a different floor. Although the administrator is able to telnet to all of the routers,the address of Switch F is needed in order to verify that the ...
A.
Issue the show ip route command on Router A
B.
Issue the show ip route command on Router B
C.
Issue the show cdp neighbors command on Router B
D.
Issue the show cdp neighbors detail command on Router C
E.
Issue the show arp command on Router A
F.
Issue the show arp command on Router B
相关题目：