In a database with the database character set of US7ASCII and a national character set of UTF-8， which datatypes would be capable of storing Unicode data by default？（） VARCHAR2。 CHAR。 NVARCHAR2。 CLOB。 LONG。
修剪时期和次数：
In a SELECT statement that includes a WHERE clause, where is the GROUP BY clause placed in the SELECT statement? （） Immediately after the SELECT clause。 Before the WHERE clause。 Before the FROM clause。 After the ORDER BY clause。 After the WHERE clause。
A Dell customer decided to use IBM Director and xSeries to manage their servers. They purchased 10 IBM x336 servers and they already have 75 various Dell servers. Which TWO steps need to be verified to be able to manage the mixed environment with IBM Director？（） Verify that the Dell systems have TCP/IP enabled。 Verify that the systems are running the IBM Director Agent。 Verify that the managed systems are SMBIOS 2.1 and WfM 2.0 compliant。 Verify that the Dell systems have at least a 1GB of memory installed。 Install an SNMP agent on the Dell systems as IBM Director cannot manage Industry Standard non-IBM server。
变压器空载电流小的原因是（）。 变压器铁心的电阻很大。 变压器的励磁阻抗很大。 一次绕组的漏抗很大。 一次绕组匝数多，电阻很大。
女性，54岁，急性胰腺炎行胆囊造瘘、胰腺引流术后，仍禁食、输液及抗感染治疗，并吸入高浓度氧，动脉血气分析为pH7.46，Pa0255mmHg，PaC0232mmHg。x线胸片示两肺有较广泛的点、片状阴影，心电图示窦性心动过速。对成人呼吸窘迫综合征的动脉血气分析符合（）
